1name: crowdsecurity/vpatch-CVE-2021-22941
2description: "Citrix RCE (CVE-2021-22941)"
3rules:
4  - and:
5    - zones:
6      - METHOD
7      match:
8        type: equals
9        value: POST
10    - zones:
11      - URI
12      transform:
13      - lowercase
14      match:
15        type: endsWith
16        value: /upload.aspx
17    - zones:
18      - ARGS
19      variables:
20       - uploadid
21      match:
22        type: contains
23        value: ".."
24labels:
25  type: exploit
26  service: http
27  confidence: 3
28  spoofable: 0
29  behavior: "http:exploit"
30  label: "Citrix - RCE"
31  classification:
32   - cve.CVE-2021-22941
33   - attack.T1595
34   - attack.T1190
35   - cwe.CWE-284